Certification programs have only scratched the surface of assessing the performance of existing buildings. A new certification program, BREEAM USA, hopes to change that by making it easier for owners and managers to find out where their buildings stand and how they can make improvements. Image: Pixabay

The redeveloped Central Terminal B at New York's LaGuardia Airport will have 35 gates. Construction of this $4 billion project started officially on June 1, as its public-private development partnership signed a long-term lease with the Port Authority of New York and New Jersey. Rendering: LaGuardia Gateway Partners